Asteroids

2025FC1 help

Last update: 2025-03-28 09:30 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.437

Aphelion (Q)

1.482

Eccentricity (e)

0.545

Inclination (i)

19.1

deg

Orbit period (P)

343.2

Earth MOID

0.00196

U parameter

7.4

Next Earth close approach

Date

2041-03-17

Nominal distance (from Earth center)

0.15308

22900161

Maximum Brightness

25.9

mag

Risk

Object is in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

27.7

mag

Diameter

8 - 17*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-03-21

Observatory

Mt. Lemmon Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.959285

1-sigma variation

0.000215

Unit

Eccentricity (e)

Value

0.544625

1-sigma variation

0.000280

Unit

Inclination (i)

Value

19.0733

1-sigma variation

0.0154

Unit

Long. of Ascending Node (Ω)

Value

179.4575

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

233.2928

1-sigma variation

0.0038

Unit

Mean Anomaly (M)

Value

111.13489

1-sigma variation

0.05977

Unit

Perihelion distance

Value

0.436835

1-sigma variation

Unit

Aphelion distance

Value

1.481735

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.004277

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.494284

1-sigma variation

Unit

MOID

Value

0.001959

1-sigma variation

Unit

Orbit Period

Value

343.1783

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.61940E-8	5.97133E-8	3.29543E-6	-3.88713E-8	7.06899E-7	-1.28371E-5
e	5.97133E-8	7.83295E-8	4.30301E-6	-4.74114E-8	8.47923E-7	-1.66724E-5
i	3.29543E-6	4.30301E-6	2.36753E-4	-2.66583E-6	4.79369E-5	-9.18745E-4
Ω	-3.88713E-8	-4.74114E-8	-2.66583E-6	4.00507E-8	-7.58548E-7	1.06067E-5
ω	7.06899E-7	8.47923E-7	4.79369E-5	-7.58548E-7	1.46214E-5	-1.91914E-4
M	-1.28371E-5	-1.66724E-5	-9.18745E-4	1.06067E-5	-1.91914E-4	3.57274E-3

Date of computation: 2025-03-24 19:37 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

27.657

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

8 - 17*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

1.0

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.753166

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-03-21.224116

Unit

Source

[2]

Last Observation

Value

2025-03-22.197214

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (2)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2025FC1 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1954-03-18 00:47	> 1 d	0.1730887	0.0098970	0.1471600
EARTH	1968-03-18 20:41	> 1 d	0.0196443	0.0036644	0.0685814
EARTH	1982-03-20 19:15	> 1 d	0.0314424	0.0033786	0.0637687
EARTH	1996-03-24 17:32	> 1 d	0.1575522	0.0069934	0.0503280
EARTH	2011-03-18 08:05	378.5	0.1010518	0.0172250	0.0280295
EARTH	2025-03-19 23:21	< 1 min	0.0042778	0.0042695	0.0000028
EARTH	2041-03-17 19:12	277.8	0.1530781	0.0615151	0.0305521
EARTH	2056-03-20 19:32	> 1 d	0.0363223	0.0012697	0.0550302
EARTH	2072-03-18 08:08	797.8	0.0654923	0.0011382	0.0316097
EARTH	2087-03-25 19:42	> 1 d	0.1538207	0.0002154	0.0937640
EARTH	2088-03-18 11:25	> 1 d	0.1984044	0.0098722	0.0916867
EARTH	2103-03-22 06:40	> 1 d	0.0191573	0.0000300	0.1429906
EARTH	2119-03-22 04:28	> 1 w	0.0133587	0.0003419	0.8185438

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
94.13169963	76.02114770	0.00195877	MINIMUM
276.43494222	194.65417143	0.30674578	MINIMUM
188.28724019	133.06196409	0.57683304	SADDLE
5.36469638	320.45888996	0.58166058	SADDLE
0.74269551	132.01741291	1.43645854	SADDLE
177.30281927	306.95651038	2.45118120	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2025FC1

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2103-03-21.720	89243.720	-0.663	0.86 ± 0.014	4.04E6	1.29E-7	1.12E-8	-8.11
2103-03-21.722	89243.722	1.372	0.60 ± 0.009	1.29E6	2.45E-7	2.15E-8	-7.83
2103-03-21.724	89243.724	2.051	0.46 ± 0.009	8.02E4	1.30E-6	1.14E-7	-7.10
2103-03-21.725	89243.725	-0.337	0.74 ± 0.007	8.58E4	9.15E-6	7.99E-7	-6.25
2103-03-21.725	89243.725	2.799	0.46 ± 0.008	1.88E4	9.27E-7	8.14E-8	-7.25
2103-03-21.725	89243.725	3.887	0.60 ± 0.006	4.13E4	1.12E-8	9.83E-10	-9.17
2103-03-21.727	89243.727	0.176	0.58 ± 0.009	1.95E3	4.08E-4	3.56E-5	-4.61
2104-03-20.970	89608.970	0.171	0.23 ± 0.006	1.50E6	6.02E-7	5.25E-8	-7.44
2104-03-20.971	89608.971	-0.533	0.91 ± 0.000	1.09E7	6.36E-8	5.55E-9	-8.42
2106-03-21.482	90339.482	-0.574	1.16 ± 0.009	1.06E6	1.30E-7	1.13E-8	-8.12
2106-03-21.486	90339.486	-0.556	1.02 ± 0.009	1.45E5	2.91E-6	2.54E-7	-6.77
2106-03-21.489	90339.489	0.177	0.18 ± 0.253	4.83E7	1.85E-8	1.61E-9	-8.97
2109-03-21.234	91435.234	-0.681	0.99 ± 0.000	3.31E6	1.99E-7	1.74E-8	-7.95
2109-03-21.236	91435.236	-0.694	0.49 ± 0.010	1.83E6	3.68E-7	3.21E-8	-7.68
2109-03-21.238	91435.238	-0.686	1.07 ± 0.006	3.46E4	2.03E-5	1.77E-6	-5.94
2109-03-21.238	91435.238	-0.687	0.44 ± 0.005	3.51E4	2.01E-5	1.75E-6	-5.95
2109-03-21.253	91435.253	-3.157	1.14 ± 0.011	2.70E6	1.65E-9	1.43E-10	-10.03
2109-03-21.254	91435.254	-3.747	0.82 ± 0.010	1.07E6	5.58E-10	4.83E-11	-10.50
2110-03-21.487	91800.487	1.519	1.07 ± 0.010	1.17E6	1.03E-7	9.04E-9	-8.24
2111-03-21.743	92165.743	-0.926	1.01 ± 0.000	7.67E7	7.31E-9	6.37E-10	-9.40
2111-03-21.747	92165.747	-0.674	0.82 ± 0.000	7.78E6	9.22E-8	8.05E-9	-8.29
2111-03-21.748	92165.748	-0.713	0.94 ± 0.009	1.58E6	4.24E-7	3.70E-8	-7.63
2111-03-21.748	92165.748	-0.674	0.42 ± 0.008	1.92E6	3.61E-7	3.15E-8	-7.70
2111-03-21.749	92165.749	-0.924	0.80 ± 0.000	5.13E6	8.60E-8	7.50E-9	-8.32
2111-03-21.751	92165.751	-0.727	0.84 ± 0.010	1.78E6	2.94E-7	2.56E-8	-7.79
2111-03-21.751	92165.751	-0.717	0.64 ± 0.009	3.60E5	1.71E-6	1.49E-7	-7.03
2112-03-20.996	92530.996	-0.375	0.39 ± 0.000	1.10E8	7.76E-9	6.77E-10	-9.37
2112-03-21.002	92531.002	-0.919	0.78 ± 0.000	2.66E7	1.83E-8	1.60E-9	-9.00
2112-03-21.002	92531.002	-0.376	0.61 ± 0.022	8.54E6	8.68E-8	7.58E-9	-8.33
2112-03-21.003	92531.003	-0.922	0.77 ± 0.016	3.47E6	1.59E-7	1.38E-8	-8.06
2112-03-21.005	92531.005	-2.757	0.82 ± 0.006	5.83E5	3.29E-8	2.86E-9	-8.75
2112-03-21.006	92531.006	1.505	0.84 ± 0.008	9.98E5	2.46E-7	2.15E-8	-7.87
2113-03-21.249	92896.249	3.067	0.94 ± 0.010	6.41E5	7.87E-9	6.92E-10	-9.37


Based on 28 optical observations (of which 2 are rejected as outliers) from 2025/03/21.224 to 2025/03/22.197.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.17 and 1.17 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250325 013406.906 UTC.

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